Portable braking system



FIG. 1 is a top front perspective view of a portable braking system embodying my design;

FIG. 2 is a bottom front perspective view of the portable braking system of FIG. 1;

FIG. 3 is a top rear perspective view of the portable braking system of FIG. 1;

FIG. 4 is a bottom rear perspective view of the portable braking system of FIG. 1;

FIG. 5 is a top plan view of the portable braking system of FIG. 1;

FIG. 6 is a front elevational view of the portable braking system of FIG. 1;

FIG. 7 is a left side elevational view of the portable braking system of FIG. 6;

FIG. 8 is a right side elevational view of the portable braking system of FIG. 6;

FIG. 9 is a rear elevational view of the portable braking system of FIG. 1; and,

FIG. 10 is a bottom plan view of the portable braking system of FIG. 1. 

CLAIM The ornamental design for a portable braking system, as shown and described. 